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KB3302DD

更新时间： 2024-11-30 03:47:23
品牌 Logo 应用领域
KINGBOR 调节器开关软启动
页数 文件大小 规格书
17页 249K
描述
2Amp, 2MHz Step-up Switching regulator with Soft-Start

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中文翻译

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KB3302DD 数据手册

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Kingbor Technology Co.,Ltd  
TEL:(86)0755-26508846 FAX:(86)0755-26509052  
KB3302  
2Amp, 2MHz Step-up Switching  
regulator with Soft-Start  
DESCRIPTION  
FEATURES  
The KB3302 is a high-frequency current-mode step-up  
switching regulator with an integrated 2A power transis-  
tor. Its high switching frequency (programmable up to  
2MHz) allows the use of tiny surface-mount external pas-  
sive components. Programmable soft-start eliminates high  
inrush current during start-up. The internal switch is rated  
at 32V making the converter suitable for high voltage ap-  
plications such as Boost, SEPIC and Flyback.  
■
■
■
■
■
■
■
■
■
■
Up to 95% Efficiency  
TDB uA No Load Current  
1000mA Output Current  
1.5V to 16V Input Voltage Range  
Programmable switching frequency up to 2MHz  
Output voltage up to 32V  
Constant switching frequency current-mode control  
1.23V Reference Allows Low Output Voltages  
Shutdown Mode Draws)10µA Supply Current  
Low saturation voltage switch: 220mV at 2A  
The operating frequency of the KB3302 can be set with an  
external resistor. The ability to set the operating frequency  
gives the KB3302 design flexibilities. A dedicated COMP  
pin allows optimization of the loop response. The KB3302  
is available in thermally enhanced 8-Pin MSOP packages.  
■
■
Overtemperature Protected,Soft-Start function  
8-Pin MSOP Packages  
APPLICATIONS  
■
Flat screen LCD bias supplies  
■
TFT bias supplies  
■
XDSL power supplies  
■
Medical equipment  
■
Digital video cameras  
■
Portables devices  
■
White LED power supplies  
TYPICAL APPLICATION  
KB3302 Efficiency  
L1  
3.3µH  
ꢀꢁ  
V
OUT  
V
= 3.3V  
IN  
TO 4.2V  
5.0V  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
1000mA  
VOUT = 5V  
1.2MHz  
1N5819  
C1  
4.7µF  
6
5
SW  
R1  
VIN  
300k  
VIN = 4.2V  
2
3
ꢂꢃꢃꢄꢄꢂꢅ  
FB  
SHDN  
SS  
C3  
22 µF  
KB3302  
MSOP8  
7
1
COMP  
R2  
100k  
R3  
GND  
4
ROSC  
8
17.4k  
100nF  
R3  
10.7k  
1nF  
VIN = 3.6V  
VIN = 2.6V  
L1: Sumida CR43  
Figure 1. 1.2MHzAll Ceramic Capacitor Single Li-ion Cell  
to 5V Boost Converter.  
0.001  
0.010  
0.100  
1.000  
Load Current (A)  
1
1234567...17

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